Charging nanoparticle enhanced bio-based PCM in open cell metallic foams: An experimental investigation

Al-Jethelah, Manar; Ebadi, Soroush; Venkateshwar, Kumar; Tasnim, Syeda Humaira

doi:10.1016/j.applthermaleng.2018.11.121

Cited by 151 publications

(30 citation statements)

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“…There are no reports assessing margarine and shortening as potential PCMs in terms of their thermal properties and their thermal stabilities, and only a few studies reporting the thermal properties of coconut oil and its application as a PCM for TES [25,26,[29][30][31][32][33][34][35]. The latter showed that coconut oil could be useful for TES in buildings, given that its transition temperature is between 22 and 27 • C [25,26,[30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

“…However, the coconut oil PCM studies reported a wide range of values for the latent heat of fusion, ∆ fus H, and for the specific heat capacity. For instance, the specific heat capacities and ∆ fus H measured by the T-history method [29] had large uncertainties, with a reported value of ∆ fus H of 249 J g −1 , significantly higher than ∆ fus H of 103 J g −1 determined by differential scanning calorimetry (DSC) [33,34]. Furthermore, important properties such as the accurate thermal conductivity of both the solid and liquid phases, the degree of supercooling and information on the thermal stability after several melt-freeze cycles have not been reported for coconut oil.…”

Section: Introductionmentioning

confidence: 99%

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Edible Oils as Practical Phase Change Materials for Thermal Energy Storage

Kahwaji

White

2019

Applied Sciences

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Edible oils could provide more accessible alternatives to other phase change materials (PCMs) for consumers who wish to build a thermal energy storage (TES) system with sustainable materials. Edible oils have good shelf life, can be acquired easily from local stores and can be less expensive than other PCMs. In this work, we explore whether margarine, vegetable shortening, and coconut oil are feasible PCMs, by investigations of their thermal properties and thermal stability. We found that margarine and vegetable shortening are not useful for TES due to their low latent heat of fusion, ΔfusH, and poor thermal stability. In contrast, coconut oil remained thermally stable after 200 melt-freeze cycles, and has a large ΔfusH of 105 ± 11 J g−1, a low degree of supercooling and a transition temperature, Tmpt = 24.5 ± 1.5 °C, that makes it very useful for TES in buildings. We also determined coconut oil’s heat capacity and thermal conductivity as functions of temperature and used the measured properties to evaluate the feasibility of coconut oil for thermal buffering and passive heating of a residential-scale greenhouse.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Edible Oils as Practical Phase Change Materials for Thermal Energy Storage

Kahwaji

White

2019

Applied Sciences

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“…Addressing this issue, several experimental works were carried out to investigate the effect of nano‐PCMs on natural convection effect . Also, research work pertaining to the usage of metal fins, matrix structure, carbon fiber, metal powders, and dispersion of nanoparticles inside a PCM was also studied . It may be noted that along with the improvement of effective thermal conductivity, an undesirable property of increase in viscosity of the liquid PCM was also observed .…”

Section: Introductionmentioning

confidence: 94%

An image processing algorithm to estimate the melt fraction and energy storage of a PCM enclosed in a spherical capsule

et al. 2019

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Summary The experimental investigation of the melting behavior of a phase change material (PCM) inside a spherical container is reported. PCM considered for the study is lauric acid whose melting point is about 43°C. Unconstrained melting experiments are carried out at two different temperatures, ie, at 60°C and 80°C. The initial temperature of the PCM is taken as 30°C. To carry out a detailed analysis of the heat transfer, the transient variations in the melt fraction and amount of energy stored are derived. In order to estimate the liquid/solid volumes, a novel image processing technique is developed. In this approach, a circle‐fitting algorithm is employed to obtain the amount of PCM melted inside a spherical container. The total instantaneous amount of heat transport to the PCM is measured with an uncertainty of about 6.1%. The results obtained by the introduced circle‐fitting algorithm have been compared qualitatively and quantitatively with the solid modeling method. The present technique could capture the asymmetric behavior of the solid PCM. The experimental findings show that the rate of melt fraction is high at the beginning of the experiment due to a larger area of contact between the spherical container and solid PCM. Further, parametric analysis has been performed and reported in terms of Fourier, Stefan, and Grashof numbers.

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“…Thus, a PCM with higher latent-heat and thermal conductivity with stable chemical structure is the most suitable. To overcome this issue, researchers have introduced several heat transfer enhancement techniques including extruded metal-fins [12,13,14,15,16,17], metal-foam and porous materials [18,19], nanomaterials [20,21,22] encapsulated micro/nano-capsules [23,24,25,26].…”

Section: Introductionmentioning

confidence: 99%

Thermophysical characteristics and application of metallic-oxide based mono and hybrid nanocomposite phase change materials for thermal management systems

Arshad

Jabbal

Yan

2020

Applied Thermal Engineering

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This experimental study covers the chemical, physical, thermal characterization and application of novel nanocomposite phase change materials (NCPCMs) dispersed by TiO 2 , Al 2 O 3 , and CuO nanoparticles. A commercial-grade of paraffin, namely RT-35HC, was considered as a phase change material (PCM). The mono and hybrid NCPCMs were synthesized at a constant weight concentration of 1.0 wt.%. In the first phase, various characterization techniques were used to explore the thermophysical properties and chemical interaction of mono and hybrid NCPCMs. In the second phase, the thermal cooling performance was investigated by filling the prepared NCPCMs in a heat sink at various input power levels. The results showed the uniform dispersion of TiO 2 , Al 2 O 3 , and CuO nanoparticles onto the surface of both mono and hybrid NCPCMs without altering the chemical structure of RT-35HC. The optimum latent-heat of fusion and highest thermal conductivity of 228.46 J/g and 0.328 W/m.K were obtained, respectively, of Al 2 O 3 +CuO dispersed hybrid NCPCM compared to pure RT-35HC. In comparison of RT-35HC, the increasing trend in specific heat capacity was observed of NCPCMs and 36.47% enhancement was obtained for hybrid NCPCM in solid-phase. The reduction in heat sink base temperature was achieved of 3.67%, 6.13%, 13.95% and 8.23% for NCPCM T iO 2 , NCPCM Al 2 O 3 , NCPCM CuO and NCPCM Al 2 O 3 +CuO , respectively, compared to RT-35HC. Further, no phase segregation, less subcooling, smaller phase transition temperature, higher chemical and thermal stability were observed with hybrid NCPCMs which can be used potentially for thermal management of electronic devices, Li-ion batteries and photovoltaic (PV) modules systems.

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Charging nanoparticle enhanced bio-based PCM in open cell metallic foams: An experimental investigation

Cited by 151 publications

References 50 publications

Edible Oils as Practical Phase Change Materials for Thermal Energy Storage

Edible Oils as Practical Phase Change Materials for Thermal Energy Storage

An image processing algorithm to estimate the melt fraction and energy storage of a PCM enclosed in a spherical capsule

Thermophysical characteristics and application of metallic-oxide based mono and hybrid nanocomposite phase change materials for thermal management systems

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